2D morphing video images
Try image sequence import addon. This makes animated images appear on plane. See this video link here. 
https://m.youtube.com/watch?v=3UOywRFIpLM&amp;feature=youtu.be 

Updated addon link: https://github.com/vicentecarro/ImageSequenceAsPlanes 

First create image sequence from a video clip. With that addon, import Image sequence and all animated images appear on plane. Subdivide the plane like a lattice. Alternatively use a knife to divide plane's face. When you move vertrice or reshape the plane, the animated image distorts, useful for morphing your way. Hope that helps. 

If unsatisfied, try DragonBones, a free open source software.